The auto update (AU) technique makes sure the card is kept up to date in order to provide the correct keys to the CAM when requested. Providers will regularly change their operational keys and unless you have a valid set of management keys, you will soon be left with a black screen. For different coding systems, the actual keys that are used for decoding, have different names. For instance, in Irdeto, they are called Plainkeys and for Seca they are called Operational Keys.